Software Engineer - Platform Infrastructure

The role

You will design and build core infrastructure for data generation, evaluation, and agentic systems. You will architect shared platforms to support large-scale human-in-the-loop workflows and automated data pipelines.

What you will do

• Architect and develop shared infrastructure for data generation platforms, human-in-the-loop systems, and evaluation pipelines.
• Build systems for processing large-scale datasets and high-throughput workloads.
• Create reusable infrastructure and APIs for product engineers and researchers.
• Design systems with strong observability, monitoring, and fault tolerance.
• Help define long-term system architecture for data pipelines, compute, orchestration, and storage.
• Work with engineers and researchers to support AI experimentation workflows.
• Define standards for system design, deployment, reliability, and infrastructure operations.

Required qualifications

• Strong experience building production distributed systems or platform infrastructure
• Proficiency in Python and/or JavaScript (Node.js / Next.js) or similar backend technologies
• Experience designing and operating systems in cloud environments (GCP or AWS)
• Experience with message queues and event-driven systems (Kafka, RabbitMQ, Pub/Sub, etc.)
• Experience working with high-throughput data pipelines and asynchronous processing systems
• Strong understanding of system scalability, performance, and reliability
• Experience owning systems running in production environments

Nice to have

• Experience building internal developer platforms or shared infrastructure
• Experience supporting large-scale data processing pipelines
• Experience with AI infrastructure, LLM evaluation systems, or ML pipelines
• Experience working at high-growth startups or scaling early infrastructure
• Experience designing human-in-the-loop or workflow orchestration systems

Benefits

• Medical, Vision, Dental
• 401(k) with Employer Match
• Daily UberEats Stipend
• Monthly Wellness Stipend

About the company

AfterQuery is an applied research lab curating data solutions for foundation model development. They are based in San Francisco and serve frontier AI labs.